本論文提出一SEPIC-Zeta雙向DC-DC轉換器，此轉換器採用耦合電感技術，可藉由耦合電感匝數比之調整，達成高電壓轉換比之功能。轉換器於放電模式及充電模式時皆具有漏感回收之機制，將漏感能量傳送至輸出端，且轉換器具有電壓箝位電路，可降低開關上之電壓應力，提高轉換器之效率。本論文中對轉換器之電路架構作一探討，分析各工作模式及穩態特性。本文首先針對所提出之轉換器電路，分析其動作原理與穩態特性，最後實作雛型電路，其電器規格低壓側與高壓側分別為24 V及400 V，輸出功率為500 W，以驗證本論文中所提轉換器之特性。

A bidirectional SEPIC-Zeta DC-DC converter with coupled inductor is proposed in this thesis. High voltage conversion is achieved and the leakage-inductor energy is recycled in both discharge mode and charge mode. Also，the switch voltage stress is reduced by the clamping circuit to achieve high efficiency in the proposed converter. The operating principles and steady-state analysis of the proposed converter are discussed in detail. Finally, a laboratory prototype circuit with low voltage side 24 V/ high voltage side 400 V and output power 500 W is implemented to verify the performance of the proposed converter.

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